I recently put a whipple on my 04 5.3, Ive noticed the oil pressure peg out in WOT, as well as oil in the tube that goes in the bottom of the intake. I had a problem with the dipstick popping out but I fixed that. Does FI create that much pressure in the crankcase? Or is it possible something is blocked/clogged somewhere? Is this something I have to live with or is there a remedy?

 

something sound wrong in the pcv system, you are creating crank case pressure, not good that ='s oil leaks.....

 

You need to check the PCV set up. Keep in mind that the entire intake manifold sees boost. So any lines coming from the manifold see boost. (PCV lines)
Move the PCV suck from the manifold to in front of the TB.
I did not do this and actually caused a valve cover leak.

You could have some blow by through the rings also.

 

I thought they removed the PCV system in 03 or 04?

 

Nope, the truck PCV system sucks. At higher RPM the PCV system picks up the oil vapor off of the valve train and pulls it into the lines. I changed mine out to the LS6 setup, LS6 valley cover and changed the routing of the PCV lines into a catch can and since doing so I get basically nothing in my catch can. Manifold and intake ports are clean as well. How are your PCV lines hooked up? None can be hooked to the intake manifold itself seeing as though you are running boost. They all have to hook upstream of the supercharger rotors, either before the TB or in the elbow on the rear of the blower.

 

its hooked up like whipple recomended, which is to switch the valve covers and take about a 1/2 in. tubing from the far valve cover to the intake pre-TB. I only noticed this when I put bigger injectors and removed the craptronics.

 

Ummm, how did you fix it? That is usually a sign of problems ahead.......

 

doubled the O-rings it gave just a little tighter seal

 

Part of the whipple install is bending the crap out of the dipstick tube and after doing so its like it preloads the dipstick. I had a buddy with a whipple and you could put the dipstick in and never start the motor and tap on the tube and the dipstick would jump back out about 1/2" haha.